JPS62113304A - Damage detecting wire for metal coated net-fence - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a destruction detection wire for a metal-coated net fence, specifically, a destruction detection wire that is incorporated into a metal-coated net fence to detect destruction of the net fence by an intruder or the like. Regarding destruction detection wires.

[Prior Art] Aluminum-coated net fences are known to be highly resistant to corrosion and superior in mechanical strength to other net fences. Then, as a maintenance equipment that added a destruction detection function to this net fence,
As stated in Publication No. 399, ``A conductor such as a copper wire is installed inside the slip, and an intruder can pickpocket by energizing it.
A device is known that is configured to detect if the knob is cut.

[Problems to be Solved by the Invention] However, in this known destruction detection means, if the sheathing material is metal, if there is a short circuit between the copper wire and the sheathing material when it is cut, there is a risk of damage to the earth. This had the disadvantage that it formed a closed loop, making detection impossible. It also had the disadvantage that it could not be detected due to short circuits due to poor insulation between the covering material and the copper wire.

SUMMARY OF THE INVENTION The present invention aims to eliminate such drawbacks, and aims to provide a destruction detection wire that is used in a metal corrugated net fence and is capable of reliably detecting breakage when it occurs.

Means and operation for solving problem E] The destruction detection wire for a metal corrugated net fence of the present invention has an open type and a closed loop type signal line in a coated wire forming a metal wire incorporated in a metal corrugated net fence. In addition, either a reinforcing wire and a reinforcing layer, or a reinforcing wire and a reinforcing layer are arranged around the signal wire and built into the above-mentioned covering material, and a detection receiver is attached to this detection wire. By making a connection, when this detection line is disconnected, this will be detected by the detection receiver.

[Example] Hereinafter, the present invention will be explained with reference to illustrated embodiments.

FIG. 1 is an enlarged cross-sectional view of a destruction detection wire for a metal-coated net fence showing an embodiment of the present invention.

This destruction detection wire 1 is used, for example, by being incorporated into an aluminum-covered net fence stretched to prevent intrusion into steel towers, and is made of hollow metal made of aluminum or aluminum alloy, which is the same material as the net fence. Steel, glass fiber,
A hollow reinforcing layer 3 made of plastic or the like is provided, and several stages of signal wires 4 and reinforcing wires 5 are passed through the hollow portion of the reinforcing layer 3. Each signal line 4 is connected to the reinforcement layer 3 and the reinforcement wire 5.
surrounded by. The signal line 4 is made of a coated copper wire, and the reinforcing wire 5 is made of the same abrasive material as the reinforcing layer 3.

As shown in FIG. 2, the signal wires 4 each include an open type signal wire 4a and a closed loop type signal wire 4b, and these signal wires 4a, 4b and the mff1 material 2 One end on the detection side is connected to a receiver 6 with a self-diagnosis function. The open signal line 4a is in an open state at the other end on the far side of the detection line 1 and is not connected to any other signal line or any conductive part.
Two or more closed loop type signal lines 4b are combined and connected to each other at the other end on the far side to form a closed loop. Therefore, normally these signal lines 4a from the receiver 6.

4b, the open type signal line 4a is detected as an infinite resistance, and the closed loop type signal line 4b is detected as a short circuit resistance.

Here, if the destruction detection line 1 is cut, the open type signal line 4a may be connected to another signal line or TM material 2 at the cut point, so in this case, the open type signal line 4a is detected by the bipedal receiver 6 as a short circuit resistance. Furthermore, if the -12 closed loop type signal vA4b is cut, there is a very high probability that the two signal lines that had previously formed a closed loop will separate at the cut point and become open. At this time, the closed loop signal line 4b is detected by the receiver 6 as an infinite resistance. That is, one end of the destruction detection line 1 is monitored by the receiver 6, and a change in the open type signal line 4a from an open state to a short-circuited state, or a change in a closed-loop type signal line 4b from a short-circuited state to an open state is detected. Accordingly, the cutting information of the destruction detection line 1 can be obtained.

Further, self-diagnosis of the destruction detection line 1 during normal operation is performed by monitoring the state of insulation resistance between the signal line 4 (4a, 4b) and the cover key 2 using the receiver 6.

By incorporating the destruction detection wire 1 into a net fence or using it as a metal wire itself forming the net fence, information on the destruction of the net fence can be instantly obtained, which is very effective in terms of crime prevention. It's a benefit. As for the method of assembling the destruction detection wire 1 into the net fence, the material of the covering material 2 does not necessarily have to be the same as the material of the net fence, but it is desirable that the material does not give an unnatural appearance.

In addition, the above destruction detection wire 1 for aluminum coated net fence
can be twisted as one line of perbutted wire to form a perved wire disconnection detection line.

[Effects of the Invention] As described above, when the destruction detection line of the present invention is cut, the open type signal line and the closed loop type signal line become short-circuited and open, so there is no detection at one end of the detection line. By keeping the receiver connected, disconnection information can be reliably detected. In addition, since there is a reinforcing layer, reinforcing wire, etc. between the signal line and the shingle, there is very little risk of a short circuit occurring between them and making it undetectable, as in the past, and there is no insulation between them. Since the detection receiver can constantly self-diagnose the same condition, it can also prevent false alarms due to abnormalities in the detection ring itself, providing a highly reliable destruction detection wire for metal-coated net fences. I can do it.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of a destruction detection wire for a metal-coated net fence showing an embodiment of the present invention, and FIG.
FIG. 3 is a schematic diagram of the broken edge detection line shown in the figure in a state of use. 1...... Destruction detection line 2...
・・・・・・Corrugated material 3・・・・・・・・・Reinforcement layer 4・・・・・・・・・Signal line 4a・・・・・・Open type Signal line 4b......Closed loop signal line 5...
・・・・・・Reinforcement wire 6・・・・・・・・・Receiver with self-diagnosis function Patent applicant 11 Tachiden Cable Co., Ltd. Source: Sono No. 2 Seki

Claims (1)

[Claims] An open type signal wire and a closed loop type signal wire are passed through the covering material forming the metal wire to be incorporated into the metal coated net fence, and at least one of a reinforcing wire and a reinforcing layer is arranged around the signal wire. A destruction detection wire for a metal-coated net fence, characterized in that the wire is drawn through the above-mentioned covering material.